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J. W. HYATT MACHINE EOE PERFORMING SHEET METAL. No. 283,488. Patented Aug. 21, 1883.

UNITED STATES PATENT OFFICE.

JOHN w. HYATT, or NEWARK, NEW JEEsEY.

MACHINE FOR PERFORATING SYHEETNIETAL.

SPECIlsICA'lTlONr formingpart of Letters Patent No. 283,488, dated August 2l, 1883.

i Application filed August-10, 188]. Renewed January 3, 1883. (No model.)

.T ali whom it may concern,.-

Be it known that l, JOHN NV. HYATT, of

A Newark, in the coilnty of Essex and State of Aio N ew Jersey, have invented a new and useful Improvement in Machines and Processes foras hereinafter more fully set forth.

The object of the invention is to produce a thin sheet of metal which is perforated without removing any part of the metahand, by preference, given a corrugated surface at the same time, so as to resemble and be capable of performing the functions of what is known as wire-cloth.7 By means of my invention l produce a sheet of perforated metal corresponding to wire-cloth of the finest mesh, as well as to that of a coarser grade.

Referring to the accompanying drawings,

Figure 1 is a side elevation of a machine eml bodying 'the elements of the invention. 2 is an enlarged view ,of a detached portion of the surface of the lower roller, G. lig. 3 is a section through the line 1 2, and Fig. l is a section through the line 3 4 of saine.

A indicates the ends of the machine, each consisting of two standards, a, which act as guides for the journal-blocks B, placed between them. The upper ends of the standards c are connected at each end of the machine by the removable caps D, having at their center threaded apertures, in which are inserted the set-screws E, whereby the relation of the-upper to the lower rollermay be regulated according to the thickness of the sheet of metal. l

The rollers F G are of about equal size, and have their ends mounted in the journal-blocks B. One end of the lower roller, G, projects beyond the standard A, and to it power is applied. In the present instance this end of the roller is supplied with a worm and pinion; but any other suitable power may be substituted therefor. The surface of the roller F is entirely covered with the alternating grooves e and elevations d, which grooves mesh with a counterpart series of grooves,X,turned in the lower roller, G. The roller G, in addition to being provided with the annular grooves X,

is also grooved longitudinally, as at i, the lat- Y `ter grooves intersecting the grooves X, and

separated, which is governed according to the character of the work to be performed. The length of the projections m controls the size of the perforations in the sheet of metal 5 hence l when line perforated work is t be produced the grooves will .be'cl ose together, and farther apart when coarser pertbrations are desired.

ln the operation ofthe machine, motion bcing communicated by the worm and pinion, the sheet of metal, which will by preference be of brass, is fed between the rollers F G. ln its passage between the rollers it is forced into the annular grooves e X, the effect being to draw the sheet so tightly over the projections m. as to break or perforate it over its entire surface, and as it is drawn over the projections m. and breaks it enters and receives the impression of the longitudinal grooves i. After the sheet has been passed between the rolls it is ready for use. It can be employed with satisfactory results for nearly all purposes to which wire-cloth is usually7 appliechand can be produced at a minimum c ost.

1Vhat l claim as my invention, and desire to secure by Letters Patent, is-

The rollers F G, the former supplied with i'fhealternating grooves e and elevations d, and the latter with the grooves X alternating with the projections m, substantially as set forth. Y

In testimony that l claim the foregoing improvement in machines and processes for perforating sheet metal, as above described, I have hereunto set my hand this Sth day of August, 1881.

JOI-DT XV. HYATT.

W'itnesses:

(inns. C. GIEL,

HERMAN GUsTow. 

